Pengfei Zhou
Research Scientist, Advanced Digital Sciences Center (ADSC), Illinois at Singapore

Address: 1 CREATE Way, #14-02 CREATE Tower, Singapore 138602

I will join University of Pittsburgh in September 2022, and have multiple openings for PhD students. If you are interested in building mobile or networked systems, feel free to contact me.


Pengfei Zhou is a Research Scientist in Advanced Digital Sciences Center (ADSC), Illinois at Singapore. He was a Research Fellow in Alibaba-NTU Joint Research Institute (JRI), Singapore and a Technical Advisor for Alibaba Group. He founded and led fayfans Co., Ltd in Beijing developing products and services using advanced AIoT and HCI technology from 2016 to 2019. He received the B.E. degree in Department of Automation from Tsinghua University in 2009, and the Ph.D. degree in School of Computer Science and Engineering from Nanyang Technological University in 2016.

Research Interests

Mobile and Intelligent Systems, Artificial Intelligence of Things (AIoT), Autonomous Cyber Physical Systems, 5G Networking and Applications.


Conference Papers

[MobiCom'22] "Experience: Adopting Indoor Outdoor Detection in On-demand Food Delivery Business", In ACM MobiCom, Sydney, Australia, October 2022. (PDF), (Video).
Pengfei Zhou, Yi Ding, Yang Li, Mo Li, Guobin Shen, Tian He.
Business adoption of IODetector published in ACM SenSys 2012.

[SenSys'21] "LIMU-BERT: Unleashing the Potential of Unlabeled Data for IMU Sensing Applications", In ACM SenSys, Coimbra, Portugal, November 15-17, 2021. (PDF), (Code), (Video).
Huatao Xu, Pengfei Zhou, Rui Tan, Mo Li, Guobin Shen.
ACM SenSys 2021 Best Paper Runner-up.

[Ubicomp'19] "Amateur: Augmented Reality based Vehicle Navigation System", In ACM Ubicomp, Vol.2, No.4, Article 155, London, UK, December 2019. (PDF), (Video).
Chu Cao, Zhenjiang Li, Pengfei Zhou, Mo Li.

[ICCCN'17] "Memento: An Emotion Driven Lifelogging System with Wearables", In IEEE ICCCN, Pages 1-9, Vancouver, Canada, July-August 2017. (PDF).
Shiqi Jiang, Pengfei Zhou, Zhenjiang Li, and Mo Li.

[MiSeNet'17] "NFC-enabled Attack on Cyber Physical Systems: A Practical Case Study", In the 6th IEEE Annual International Workshop on Mission-Oriented Wireless Sensor and Cyber-Physical System Networking, May. 1-4, 2017. (PDF).
Fan Dang, Pengfei Zhou, Zhenhua Li, and Yunhao Liu.

[INFOCOM'17] "Large-Scale Invisible Attack on AFC Systems with NFC-Equipped Smartphones", In IEEE INFOCOM, Atlanta, USA, May 2017. (PDF), (Technology Transfer).
Fan Dang, Pengfei Zhou, Zhenhua Li, Ennan Zhai, Aziz Mohaisen, Qingfu Wen, Mo Li.

[MobiCom'16] "DopEnc: Acoustic-based Encounter Profiling using Smartphones", In ACM MobiCom 2016, New York, USA. (PDF).
Huanle Zhang, Wan Du, Pengfei Zhou, Mo Li, Prasant Mopahatra.

[IWCMC'16] "A Real Independent Centimeter-grade 3D Indoor Localization System on Smartphone", In 2016 International Wireless Communications and Mobile Computing Conference, pp. 824-829, 2016. (PDF).
Fan Dang, Xuan Ding and Pengfei Zhou.

[ICDCS'15] "Urban Traffic Monitoring with the Help of Bus Riders", In IEEE ICDCS 2015. Columbus, Ohio, USA, 2015. (PDF).
Pengfei Zhou, Shiqi Jiang, Mo Li.

[MobiCom'14] "Use It Free: Instantly Knowing Your Phone Attitude", In ACM MobiCom, Maui, Hawaii, USA, September 2014. (PDF), (Video).
Pengfei Zhou, Mo Li, and Guobin Shen.

[SenSys'12] "IODetector: A Generic Service for Indoor Outdoor Detection", In ACM SenSys, Toronto, Canada, November 2012. (PDF), (Code), (Technology Transfer).
Pengfei Zhou, Yuanqing Zheng, Zhenjiang Li, Mo Li, and Guobin (Jacky) Shen.

[MobiSys'12] "How Long to Wait?: Predicting Bus Arrival Time with Mobile Phone based Participatory Sensing", In ACM MobiSys, Pages 379-392, Low Wood Bay, United Kingdom, June 2012. (PDF), (Video).
Pengfei Zhou, Yuanqing Zheng, and Mo Li.

Journal Articles

[TMC] "Think Like A Graph: Real-Time Traffic Estimation at City-Scale", In IEEE Transactions on Mobile Computing, Vol. 18, Issue 10, October 2019. (PDF).
Zhidan Liu, Pengfei Zhou, Zhenjiang Li, and Mo Li.

[TOSN] "Memento: An Emotion Driven Lifelogging System with Wearables", In ACM Transactions on Sensor Networks, Vol.15, Issue 1, Article 8, January 2019.
Shiqi Jiang, Pengfei Zhou, Zhenjiang Li, and Mo Li.

[TMC] "Pricing Data Tampering in Automated Fare Collection with NFC-equipped Smartphones", In IEEE Transactions on Mobile Computing, Vol. 18, Issue 5, May 2019.
Fan Dang, Ennan Zhai, Zhenhua Li, Pengfei Zhou, Aziz Mohaisen, Kaigui Bian, Qingfu Wen, and Mo Li.

[TMC] "An Acoustic-based Encounter Profiling System", In IEEE Transactions on Mobile Computing, Vol 17, Issue 8, Pages 1750-1763, August 2018.
Huanle Zhang, Wan Du, Pengfei Zhou, Mo Li, and Prasant Mohapatra.

[T-ITS] "A Participatory Urban Traffic Monitoring System: The Power of Bus Riders", In IEEE Transactions on Intelligent Transportation Systems, Vol.18, Issue 10, October 2017.
Zhidan Liu, Shiqi Jiang, Pengfei Zhou, and Mo Li.

[TOSN] "IODetector: A Generic Service for Indoor/Outdoor Detection", In ACM Transactions on Sensor Networks, Vol. 11, Issue 2, Article 28, February 2015.
Mo Li, Pengfei Zhou, Yuanqing Zheng, Zhenjiang Li, and Guobin (Jacky) Shen.

[TMC] "How Long to Wait?: Predicting Bus Arrival Time with Mobile Phone based Participatory Sensing", In IEEE Transactions on Mobile Computing, Vol. 13, Issue 6, Pages 1228-1241, June 2014.
Pengfei Zhou, Yuanqing Zheng, and Mo Li.

Research Projects and Technology Transfer to Products

☞ [Project] Attack-Resilient AI-Empowered Autonomous Cyber-Physical Systems (2022-present)

The recent fast advance of artificial intelligence technologies enables various autonomous cyber-physical systems (e.g., autonomous vehicles and unmanned aerial vehicles) to accomplish sophisticated tasks in realworld environment. However, the cyber components of these systems face increasing threats from adversaries. We study both the internal and external attacks on sensor data, i.e., sensor data corruption by attackers who have obtained access to the system's sensors and adversarial examples that can be implemented by introducing tiny changes to the system’s environment. We design attack detection and thwarting approaches and develop their efficient implementations suitable for embedded hardware accelerators.

☞ [Project] Intelligent large scale sensing and systems with AIoT (2020-present)

We use advanced AI techniques like BERT and Federated Learning to solve practical challenges in large-scale sensing systems and IoT applications. We are adopting BERT from NLP domain to extract general features from massive unlabelled data in real world. The design has been validated in various open-source datasets with average accuracy over 90% for IMU-based activity recognition application.
Try LIMU-BERT for your purpose.
We leverage the IMU-based activity recognition for automatic and user-friendly human-IoT interactions.

☞ [Project] Improving real time video streaming in 5G networks (2020-present)

This project aims to improve the real time video streaming performance in 5G by incorporating the video context information and highly dynamic cellular network conditions. Empirical experiments have validated our hypothesis on the problem.

☞ [Product] YuFeiMen: Smart authentication system with various interfaces (2017-2019)

YuFeiMen is an intelligent identity authentication product, supporting various authentication interfaces including gesture-based commands, face recognition, dynamic QR code and NFC-based communication. The product is being used in many scenarios like office buildings, industry parks, chain hotels, etc. PoE (Power over Ethernet) technology is used in the product so that the deployment and maintenance overhead is greatly reduced compared to traditional systems.

☞ [ProjectProduct] Ensuring system security for NFC-based AFC systems (2016-2019)

This project investigated the security problems and possible attacks in current NFC-based Auto Fare Collection (AFC) systems, which are widely used in the public transit systems worldwide. Based on the results, we launched the Kakachong product in 2016, which is a mobile app for toping up smart cards using NFC-equipped smartphones.

☞ [Project] Instant 3D orientation estimation of mobile phones for mobile systems and gaming interfaces (2013-2015)

3D phone orientation is valuable for various applications including mobile systems and orientation based HCI for mobile gaming (demo video). This project solved the problem of instant 3D orientation estimation of smartphones. We understood the characteristics of gyroscope, accelerometer and magnetometer sensor through comprehensive experiments and analysis. We proposed to continuously track the orientation primarily using gyroscope and opportunistically calibrate the orientation using accelerometer and compass when we sense the "good moment".

☞ [ProjectProduct] IODetector: Generic indoor/outdoor detection system (2011- present)

Try IODetector source code for Android devices for your purpose.

The indoor/outdoor status is the essential and primitive information for various applications. We proposed IODetector, which tracks people's indoor/outdoor status using the smartphone on-board sensors (e.g., light sensor, cellular module and magnetism sensor, etc.) and achieves high accuracy with little power overhead. The pilot prototype was developed in 2012. In 2019, we did a technology transfer of IODetector for, which is Alibaba's on-demand food delivery platform. IODetector helps better understand the courier's working status and improve the delivery efficiency. It is now being deployed in over 300 cities in China and running on the mobile phones of over 1 million couriers. According to real world A/B testing, IODetector helps shorten the average delivery time of each order by 19 seconds and reduce the late delivery rate of orders relatively by 5.6%, which translate to yearly ~108 million RMB cost saving for couriers and restaurants, and ~11 million RMB profit gain for platform.

☞ [Project] Urban traffic informatics with crowdsensing (2011-2018)

This traffic sensing system solely relies on the collaborative effort of participating users and is independent from the commercial transportation companies. The real time bus information is collected from the bus riders to predict bus arrival time and estimate the traffic map of the entire urban area. Specifically, we make use of the audio beep signal from card readers to detect the boarding and cellular fingerprint to identify the bus route and track the bus. We implemented a pilot system in Singapore in 2011 and also did evaluation experiments in London in 2012.

Honors and Awards

  • Best Paper Runner-up, ACM SenSys, 2021.
  • Recipient of several million CNY investment, Beijing, 2017.
  • Silver medal, first innovation and entrepreneurship competition for Tsinghua alumni, Beijing, 2016.
  • Invited to develop the standard of "Technical requirements of smart card application for smart residential area" by Ministry of Housing and Urban-Rural Development of China, Beijing, 2016.
  • Best Demo Award, IEEE SECON, Singapore, 2014.
  • Outstanding press operation volunteer for Beijing Olympics, Water Cube, Beijing, 2008.
  • Vice President, Student Association, Department of Energy and Power Engineering, Tsinghua University, 2008.

  • Patents and Technology Disclosure Records

  • "Accurate Attitude Tracking for Smartphones", US provisional patent 61/989,015, filed in 2016.
  • "A Generic Service For Indoor Outdoor Detection", NTU TECH_027_15.
  • "Accurate Attitude Tracking For Smartphones", NTU TECH_009_14.
  • "Predicting Bus Arrival Time With Mobile Phone Based Participatory Sensing", NTU TECH_176_14.
  • "一种基于NFC技术的商品防伪方法", 专利号201610857913.4.
  • "一种基于蓝牙终端的身份认证方法及系统", 专利号201610863172.0.
  • "一种基于带有NFC功能手机终端的充值方法", 专利号201621091171.0.

  • Professional Activities

  • Reviewer
  • Journals: IEEE/ACM Transactions on Networking, IEEE Transactions on Mobile Computing, ACM Transactions on Internet of Things.
    Conferences: MobiCom 2019-2021; INFOCOM 2013-2015, 2019-2020; SenSys 2019; MobiSys 2015.